Some good points here.
Why not, instead of totally nerfing a particular field, just make many mediocre fields... that way, if people clump, they'll be attacked. If Penny is full of miners, better move to Colorado... or Dublin, etc.
To find your own spot and know the particular route.... keeps noobs honest (and learning) and keeps pirates on the move.
No lazy "I'll F1 in Kansas so I can swing on by when I see a bunch of people in the system on chat screen". (Come on, now... honestly)